Thanks guys. Dreamer: the Motif ES is already on the shootout page - it's the first sample listed.
Ed: I think the AP is a good addition to the Motif but Alfredo may be correct: it is a dull-sounding board compared to the PLG150-PF. I found that working with the AP's velocity curve settings as well as the volume offset controls do affect this board's performance a lot, and there's a wide possibility of settings that change the tone. It may not be a fair comparison to put this with the rest of the piano shootout for that reason, but that probably won't stop me.

After thinking about it some more and playing tonight on my 9000 Pro with the PLG150-PF installed, I think the PF is a better choice for use with arranger or sequenced backing because it's consistantly bright. I suspect that what I don't really like about the PLG150-AP could be the choice of microphones used in the sampling process. Whatever the reason, the PF card sounds clearer to my ear. The AP card may suit piano-only players more than the PF.
I'll try to put some samples up soon to demonstrate.